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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (c) 2020 Facebook Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/aspeed,usb-vhub.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ASPEED USB 2.0 Virtual Hub Controller
+
+maintainers:
+ - Benjamin Herrenschmidt <benh@kernel.crashing.org>
+
+description: |+
+ The ASPEED USB 2.0 Virtual Hub Controller implements 1 set of USB Hub
+ register and several sets of Device and Endpoint registers to support
+ the Virtual Hub's downstream USB devices.
+
+ Supported number of devices and endpoints vary depending on hardware
+ revisions. AST2400 and AST2500 Virtual Hub supports 5 downstream devices
+ and 15 generic endpoints, while AST2600 Virtual Hub supports 7 downstream
+ devices and 21 generic endpoints.
+
+properties:
+ compatible:
+ enum:
+ - aspeed,ast2400-usb-vhub
+ - aspeed,ast2500-usb-vhub
+ - aspeed,ast2600-usb-vhub
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ aspeed,vhub-downstream-ports:
+ description: Number of downstream ports supported by the Virtual Hub
+ $ref: /schemas/types.yaml#/definitions/uint32
+ default: 5
+ minimum: 1
+ maximum: 7
+
+ aspeed,vhub-generic-endpoints:
+ description: Number of generic endpoints supported by the Virtual Hub
+ $ref: /schemas/types.yaml#/definitions/uint32
+ default: 15
+ minimum: 1
+ maximum: 21
+
+ vhub-vendor-id:
+ description: vhub Vendor ID
+ $ref: /schemas/types.yaml#/definitions/uint32
+ maximum: 65535
+
+ vhub-product-id:
+ description: vhub Product ID
+ $ref: /schemas/types.yaml#/definitions/uint32
+ maximum: 65535
+
+ vhub-device-revision:
+ description: vhub Device Revision in binary-coded decimal
+ $ref: /schemas/types.yaml#/definitions/uint32
+ maximum: 65535
+
+ vhub-strings:
+ type: object
+ additionalProperties: false
+
+ properties:
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ patternProperties:
+ '^string@[0-9a-f]+$':
+ type: object
+ additionalProperties: false
+ description: string descriptors of the specific language
+
+ properties:
+ reg:
+ maxItems: 1
+ description: 16-bit Language Identifier defined by USB-IF
+
+ manufacturer:
+ description: vhub manufacturer
+ $ref: /schemas/types.yaml#/definitions/string
+
+ product:
+ description: vhub product name
+ $ref: /schemas/types.yaml#/definitions/string
+
+ serial-number:
+ description: vhub device serial number
+ $ref: /schemas/types.yaml#/definitions/string
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - interrupts
+ - aspeed,vhub-downstream-ports
+ - aspeed,vhub-generic-endpoints
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/aspeed-clock.h>
+ vhub: usb-vhub@1e6a0000 {
+ compatible = "aspeed,ast2500-usb-vhub";
+ reg = <0x1e6a0000 0x300>;
+ interrupts = <5>;
+ clocks = <&syscon ASPEED_CLK_GATE_USBPORT1CLK>;
+ aspeed,vhub-downstream-ports = <5>;
+ aspeed,vhub-generic-endpoints = <15>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_usb2ad_default>;
+
+ vhub-vendor-id = <0x1d6b>;
+ vhub-product-id = <0x0107>;
+ vhub-device-revision = <0x0100>;
+ vhub-strings {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ string@409 {
+ reg = <0x409>;
+ manufacturer = "ASPEED";
+ product = "USB Virtual Hub";
+ serial-number = "0000";
+ };
+ };
+ };